BREAKING: More Than 20 Injured By Axe Wielding Maniac on Passenger Train

Although it is a politically inconvenient fact authorities are always reluctant to acknowledge, the shout of “Allahu Akbar” as someone detonates an explosive, aims a gun or lunges with a knife is a fairly good indication of the intent and background of the attacker.

The often mistranslated phrase is not Arabic for “God is great,” but rather for “Allah is greater” a none-too-subtle distinction.

And so it was on a Monday evening in Germany, near the Bavarian town of Ochsenfurt, when a teenaged boy attacked terrified passengers on a commuter train with an axe shouting the battle cry of radical jihadists.

ISIS claimed the attacker as its own and a handmade ISIS flag was found among his belongings.

One person was killed in the attack and three other passengers were hospitalized in critical condition with axe and knife wounds, while another 14 were treated for more minor wounds and shock.

The as-yet unidentified 17-year-old entered the country as an “unaccompanied minor refugee” – along with 1.1 million other Syrians and Afghans during the past year – had just moved in with a German foster family in the town, about 90 miles southeast of Frankfurt, after living in a refugee camp.

The boy, who is thought to be from Afghanistan, fled the train car and was shot and killed by police.

“It is quite probable that this was an Islamist attack,” said a ministry spokesperson, adding the usual disclaimer that the investigation was ongoing.

Photographs of the train car showed a bloody floor bystanders described as “looking like a slaughterhouse,” and others recounted seeing passengers crawling from the train onto the platform when it came to a stop.

The regional line has been closed as a crime scene.

With the recent attack on the seaside promenade in Nice, France last week, Germany’s terror threat level has been designated as “high,” and Great Britain’s Foreign Office has advised Britons to take precautions when traveling there, as well as to other countries on the Continent.